Boiler-furnace



{No Model.) J P 3 Sheets-Sheet 1. BOILER FURNACE.

Nb. 459,435. I Patented Sept. 15 1891.

WOODOOOGBQQOOQQOOGOOOGQ0000 x@QOOOGOOOGGOOOO0600000000!!! I W 207%7688868. Invert/i0?! (1 W Jaw-arms. @fima wfi; gym w wfi.

2 t e 8 h S F l e e h S 3 M I Ln B -R P L Tum B M d 0 M 0 W No. 459,435. Patented Sept. 15,1891.

lazLfimesse/sz "mi mama rung co, worn-mum, vummuwn n c (No Model.) 3 Sheets-Sheet 3. J. F. BLISS.

BOILER FURNACE.

Patented Sept. 15,1891.

2%?671/6/5898. Ira/970 5014 fifya/v Q1 &% g M r w.

UNITED STATES PATENT OFFICE.

JAMES F. BLISS, OF BOSTON, MASSACHUSETTS.

BOILER-FURNACE.

SPECIFICATION forming part of Letters Patent No. 459,435, dated September 15, 1891.

Application filed April 29, 1891- Serial No.391,022- (No model.)

To 01. whom it may concern.-

Be it known that 1, JAMES F. BLISS, of Boston, county of Suffolk, State of Massachusetts, have invented an Improvement in Boiler-Furnaces, of which the following description, in connection with the accompanying drawings, is a specification,like letters on the drawings representing like parts.

This invention has for its obj eat to improve the construction of boiler-furnaces for or in connection with return-flue boilers.

In accordance with this invention the boiler, having the usual return-fines, is supported on jacks, preferably in an adjustable manner. The water-j acket is placed beneath said boiler, being formedto contain within it a fire-box, ash-pit. and draft-chamber. The water-jacket is connected with the boiler by numerous pipes to obtain a proper circulation.

I have employed a water-grate and a waterleg back of it, and so far as the essential features of my invention are concerned said water-leg may be located directly beneath the boiler to leave a draft opening or passage below it, thereby insuring a downdraft; or it may reston the water-jacket with an opening or passage above it, insuring an updraft. This water-jacket, containing a water-grate, water-leg back of it, ash-pit, and draft-chamber, and the pipes connecting said waterjacket with the boiler constitute the boilerfurnace.

Figure 1 shows in side elevation a boiler and furnaceembodying this invention; Fig. 2, a longitudinal section of the boiler-furnace shown in 1 and in elevation the boiler; Fig. 3, a front elevation of the boiler and furnace shown in Fig. 1.

(t represents a return-flue boiler of any usual or suitable construction. Upon each side of it ears or lugs a are secured, which rest upon jacks (herein shown as composed of columns a and screw-rods a being thereby adjustable. Beneath said return-flue boiler a a Water-jacket b is placed, it being shown as substantially rectangular in crosssection from the front rearwardly for about one-half its length and semicircular in cross-section the remaining distance. This water-jacket b is extended some distance beyond the rear end of the boiler a, as best shown in Fig. 2, where it communicates with a suitable shell 0 on the rear end of said boiler. The waterjacket b at its forward end contains the watergrate cl and the water-leg e, resting against the under side of the boiler a, thereby leaving an opening beneath it to insure a downdraft. The water-leg c is connected with the waterjacket to allow free passage of the water from side to side. Back of said water-leg e the water-jacket simply presents a draft flue or chamber, and the shell 0 also forms a draft flue or chamber, which incloses the entrance to the fines of the boiler a. Numerous short pipes, as f, connect the water-jacket with the boiler to at different points to establish and maintain a good circulation.

The fire is built on the water-grate (l in usual manner, and the draft, passing down through the grate beneath the water-leg 6, passes through the flue or chamber back of it,

thence through the fines in the boiler a, and

into the uptake g at the front of the boiler. The water contained in the water-jacket 1) becomes heated and, rising, passes through the pipes f into the boiler until the water contained in the boiler is of equal temperature. By means of this water-jacket I am enabled to generate steam much quicker, to make more,

steam, having a larger quantity of water, thereby materially increasing the working capacity of any ordinary return-flue boiler.

In practice I propose to remove the usual brick boiler-furnace from beneath a returnflue boiler and to substitute therefor the furnace herein shown and connect it with the boiler in the manner shown and described.

I claim 1. The return fiue boiler a, combined with the water-jacket I), placed beneath it and shaped substantially as shown and described, and containing the water-grate d and waterleg 6, and the connecting-pipes f, connecting the water-jacket b with the boiler a to establish and maintain a circulation of water,substantially as and for the purpose set forth.

2. The return-flue boiler a and adjustable jacks for supporting it, combined with the water-jacket I), placed beneath it and shaped name to this specification in the presence of substantially as shown and described, and two subscribing Witnesses. containing the water-grate d, and Water-leg c, and short connecting-pipes f, connecting the I JAMES F. BLISS. 5 said water-jacket and boiler, substantially as Witnesses:

and for the purpose set forth. BERNICE J. NoYEs,

In testimony whereof I have signed my EDWARD F. ALLEN. 

